Dana parks



(No Model.)

D. PARKS.

AUTOMATIC LEVELING SHIPSBBRTH. No. 472,070. Patented Apr. 5, 1892.

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NITED} STATES PATENT ()FFICE.

DANA PARKS, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF FOUR-FIFTHS TO MARKSTONE, CHARLES H. SOOFIELD, HARRY GOLDBERG, AND BRAINARD A. ANDREWS, OFSAME PLACE.

AUTOMATIC LEVELING SHIPS BERTH.

SPECIFICATION forming part of Letters Patent No. 472,070, dated April 5,1892.

Application filed July 21, 1891.

To all whom it may concern.-

Be it known that I, DANA PARKS, a citizen of the United States, residingat Boston, in the county of Suffolk and State of Massachusetts,

have invented certain new and useful Improvements in Automatic LevelingShips Berths; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled [0 in the art to which it appertains to make and use the same.

Before my invention automatic leveling ships berths have been made, somewith weights underneath theberth and hung from the ceiling, and in otherways, but not successfully. By my improvement no weights are required,and the weight of the body with the springs used produce the properequilibrium at less expense and more simply and efzo fectually.

In the drawings, Figure l is a vertical longitudinal section of theberth. Fig. 2 is an inside view of the head of the berth.

A indicates the frame of the berth, comprising the head and foot boardsB, the lee board 0, and the back board D, the head and foot boards beingpreferably made of malleable iron.

Secured to the end walls of the state-room are trunnions or journalsmade in the form of short studs a, which pass through suitable holes oropenings made in the head and foot boards, these studs or journalsforming trunnions upon which the berth may oscillate or 5 swing. Securedto the stud or studs a is an arm I), which extends downwardly and isprovided at its lower end with a block 6, the said arm fitting within acurved slot in the headboard. Springs 02 cl, secured at their outer 4oends to the berth and at their inner ends to the arm I), are located oneon each side of the said arm, and preferably,but not necessarily, withinthe curved slot.

The berth is mounted upon the trunnions Serial No. 400,237. (No model.)

7 and jointed together without reference to the lines of thestate-room,the construction herein shown and described enabling theberth to be fitted into any state-room irrespective of its lines or theshear of the ship, thereby reducing the cost of construction andsimplifying the fitting.

The purpose of the springs is to prevent the too easy turning oroscillation of the berth in entering it. ating in conjunction with thesprings, serves to preserve the desired equilibrium of the berth whenthe vessel rolls.

I usually make the length of the berth about one inch less than thelength of the stateroom, so as to permit free oscillation. The mattress,which may be the mattress in common use on steam ers, is placed on anordinary spring bed-bottom, thereby insuring a free circulation of air.The lee board now in common use may also be employed.

Having thus described my invention, what I claim is- 1. In combinationwith the oscillating berth pivoted in the direction of its longitudinalaxis, a fixed arm projecting from the stud or j on rnalon which theberth swings,and springs extending from the arm to the berth on 0ppositesides of the said arm.

2. In combination with the pivoted berth, studs or journals upon whichthe berth may oscillate, an arm projecting from one of the studs andprovided at its lower end with a block working in a curved slot in oneend of the berth, and springs connected at one end with the arm and attheir opposite ends with the berth. I

In testimony whereof I affix m y signature in presence of two witnesses.

DANA PARKS.

Witnesses:

GEORGE E. BETroN, JOHN F. NELSON.

The weight of the body, oper

